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gmp_init

(PHP 4 >= 4.0.4, PHP 5)

gmp_initCreate GMP number

Description

resource gmp_init ( mixed $number [, int $base = 0 ] )

Creates a GMP number from an integer or string.

Parameters

number

An integer or a string. The string representation can be decimal, hexadecimal or octal.

base

The base.

The base may vary from 2 to 36. If base is 0 (default value), the actual base is determined from the leading characters: if the first two characters are 0x or 0X, hexadecimal is assumed, otherwise if the first character is "0", octal is assumed, otherwise decimal is assumed.

Return Values

A GMP number resource.

Changelog

Version Description
5.3.2 The base was extended from 2 to 36, to 2 to 62 and -2 to -36.
4.1.0 The optional base parameter was added.

Notes

Note:

To use the extended base introduced in PHP 5.3.2, then PHP must be compiled against GMP 4.2.0 or greater.

Examples

Example #1 Creating GMP number

<?php
$a 
gmp_init(123456);
$b gmp_init("0xFFFFDEBACDFEDF7200");
?>

Notes

Note:

It is not necessary to call this function if you want to use integer or string in place of GMP number in GMP functions, like gmp_add(). Function arguments are automatically converted to GMP numbers, if such conversion is possible and needed, using the same rules as gmp_init().

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